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I'm really new to all this ruby, gem, redmine, turnkey stuff. The problem is quite simple : I can't install any gems.

Environment : The Turnkey VM is run with virtualbox on a CentOS distro. The host machine is connected to the web through a proxy. I suspect the proxy to block the requests but I don't know how to check it. Wget requests works fine, the apt-get too but only through our cache server.